58. A sold to B his car and promised to deliver ten days later. The next day, after the sale to B, A sold the same car to C and immediately effected delivery to C. On the day agreed upon, A did not deliver the car to B. Which is correct? a. B can cancel the contract between A and C, because the contract between A and B was perfected ahead of the contract between A and C. b. B should make a demand to make A in default. C. A is liable to B for the value of the car plus damages after B makes a demand. d. A is liable to B for damages and is in default without need for any demand